OMAPL138如何在Linux下使用EDMA3驱动

yyj

4 c! B9 k( m4 \9 Z

1. [code]EDMA sample test application
   
2. /*
   7 Q, J1 I5 {* }
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   ( m7 j; y7 V  ]( z2 d$ C; m
6. *
   
7. *   This file contains EDMA3 Test code.
   ) v1 M" r  v! q  @: u& i8 _7 K
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   - V2 Q+ y  o' n' i7 a
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    4 L$ f. B  x" M; Y0 F) K7 }
12. *
    4 J2 C  A0 I* E
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    ) l' B# `. {+ j
17. * published by the Free Software Foundation version 2.
    
18. *
    " X! n( z, r4 w
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    * X$ L/ z# \$ U* ~+ n
24. 
    1 V# G) F# v9 I
25. #include <linux/module.h>
    1 g3 W" L3 P0 _0 h  z: ~! C0 i5 ?
26. #include <linux/init.h>
    ' c" C9 S1 Z1 {" ]
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    0 }( P6 G8 f; s6 N
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    9 j- F% |5 x: Y: I2 y
34. #include <linux/dma-mapping.h>
    
35. 
    & a  I" k& V* ]# `# ]; `3 Q
36. #include <mach/memory.h>
    , \7 Y! n1 t/ V; Q( X- e0 O
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    1 N6 t+ S8 f4 m. i1 }/ J  c- ?& w2 b
39. #include <asm/hardware/edma.h>
    + p$ Z: `6 u7 W% a$ D% U( Z
40. 
    0 }/ D4 N! M. C% m
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ) P7 M  q& X' l) q. a: ]; x; b5 C
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    3 l6 K1 d% z% Q/ O4 N$ J( I& L  x# W
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    & o& }! X6 ^& A$ ]$ v  }( `
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    2 Y, F% d% U& v, v$ t* f
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    " t0 m  A7 S8 c' ~1 R- y  i
60. 
    6 L3 z" [: g" R# c( e' N0 T
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    % U; i) H& T& t# B2 B1 h
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    4 y" S/ J( S: p, c# m2 `  i
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) o) I3 C8 g) r5 F$ A( ?$ ~
67. 
    # \5 \$ M: m  B9 `
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ) Y: X: F6 o% E! o
70. dma_addr_t dmaphysdest1 = 0;
    - X7 e8 P* P( ?! C( S2 a
71. dma_addr_t dmaphysdest2 = 0;
    ; e- x6 |$ @$ I7 N" x" [1 U# {
72. 
    8 }* f) s0 X/ E' y3 V
73. char *dmabufsrc1 = NULL;
    + I8 m* s" n4 j. z( I$ `/ Q0 T
74. char *dmabufsrc2 = NULL;
    ' l" n2 Q: c- U4 h
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    - j8 Y, I) S% T" l; D/ f  ^
77. 
    
78. static int acnt = 512;
    0 K  s$ o" {) a2 T" W, H
79. static int bcnt = 8;
    % x7 p  I4 ^' M# N
80. static int ccnt = 8;
    6 \/ e2 I6 ]  @! m
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    . @9 Q0 t) E- T# z( u! I# F! p. H
84. module_param(ccnt, int, S_IRUGO);

复制代码

      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
% T" l# J) z/ v; S% O! E1 e: Oarm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
9 \2 b6 T, {2 I